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Author Topic: Magnet Myths and Misconceptions  (Read 611985 times)

EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #480 on: January 06, 2015, 01:07:36 PM »
Really - Simple questions give answers!


Why is there a Concave at the Bloch Wall and not Convex? This fact is exaggerated with Longer Magnets! I know MarkE's answer but for others - Why
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EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #481 on: January 06, 2015, 01:13:19 PM »
Because there is No Magnetic Field at the Bloch Wall the Support a Convex?
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tinman

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Re: Magnet Myths and Misconceptions
« Reply #482 on: January 06, 2015, 01:18:06 PM »
Quote from: EMJunkie on January 06, 2015, 01:07:36 PM
Really - Simple questions give answers!


Why is there a Concave at the Bloch Wall and not Convex? This fact is exaggerated with Longer Magnets! I know MarkE's answer but for others - Why
Ah-the figure 8 field-nice clean pic there. I did say i thought it would be a figure 8 or peanut shape field way back in this thread. There is one test i am going to carry out that will once and for all,tell us what the field looks like without distorting it with feromagnetic material's-->just waiting for the gear to turn up i have ordered.
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EMJunkie

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Re: Magnet Myths and Misconceptions
« Reply #483 on: January 06, 2015, 01:20:28 PM »
Cool cant wait -  ;)
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tinman

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Re: Magnet Myths and Misconceptions
« Reply #484 on: January 06, 2015, 01:22:05 PM »
Quote from: EMJunkie on January 06, 2015, 01:07:36 PM
Really - Simple questions give answers!


Why is there a Concave at the Bloch Wall and not Convex? This fact is exaggerated with Longer Magnets! I know MarkE's answer but for others - Why
P.S
And the under side is even defying gravity. One would think that if there was a field as described by the other's,that at least the underside of the heavy ferrofluid would show it. But as can be seen,it is stuck fast at the center of the magnet.
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tinman

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Re: Magnet Myths and Misconceptions
« Reply #485 on: January 06, 2015, 01:25:05 PM »
Quote from: EMJunkie on January 06, 2015, 01:13:19 PM
Because there is No Magnetic Field at the Bloch Wall the Support a Convex?
As the domains within the center of the magnet are still aligned,i really cant see how it is a bloch wall. But it really dose seem to be a null zone. Anyway,in a week or two,we will know for sure what the field shape is. ;) ;)
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itsu

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Re: Magnet Myths and Misconceptions
« Reply #486 on: January 06, 2015, 01:41:43 PM »
Tinman,

as i see it, your both pictures (first EX1) are confirming what MarkE is trying to tell you guys all along.

You guys are looking at the same famous picture of an old woman or a beautiful lady depending on how you look at it.

 
Open your mind, change your view, only then you will see

Regards Itsu
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poynt99

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Re: Magnet Myths and Misconceptions
« Reply #487 on: January 06, 2015, 02:17:51 PM »
Quote from: tinman on January 06, 2015, 11:30:16 AM
Yes,because it is like i said,the field changes from X to Y,so my statement is correct when i say that the field left of the dipole center is different to that of the right of the dipole center. So the field is not a uniform field,infact the field is opposite. And the field at the center that is suppose to be of the highest density produces no power at all when swipped across an inductor. This field that is suppose to be there is a nothing field-it dosnt attract feromagnetic material,and it dosnt produce any power when passed across an inductor. Then there is the big iron filings rubbish,when all of a sudden iron filings now stick to this field that has no attraction to feromagnetic material,and produces no flux through the core of an inductor-->but is the largest flux field around a magnet ???

You see poynt-it just makes no sense. How can one of you top notch guys say-Quote:When you swipe an inductor past the north end of a magnet, you obtain a strong pulse of polarity x. When you swipe the inductor past the south end of the same magnet, you obtain a pulse of roughly the same magnitude, but polarity y (the opposite to x),
And then we get from another top notch guy saying Quote: This is wrong.  The field is fundamentally the same.  The center of the dipole will have the highest strength field, but the direction of the field does not change.

So we got one bloke saying we have an X and Y field,and another saying this is wrong,the field is the same,the direction dose not change.
Direction of what?--is this another man made muddle up?,and how can it not change if each end of the magnet produces the opposite sine wave output when the magnet approaches and leaves the core of an inductor?.

As far as the iron filings go,they do nothing more than build a path for the magnetic flux to follow. And the strange thing about this is,you can shape those iron filings how ever you want them on the paper on top of the magnet,and they will stay there--aint that a hoot.

Brad, remember my post explaining why you had the most induction when your pancake coil was in the middle? If not, perhaps review it.

The magnetic field of the magnet is not the strongest at the middle, in fact it is the same all along from end to end. But at the center, there is a maximum NET flux that can be intercepted by your coil, provided the coil encircles the magnet as you have shown.
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tinman

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Re: Magnet Myths and Misconceptions
« Reply #488 on: January 06, 2015, 02:18:22 PM »
Quote from: itsu on January 06, 2015, 01:41:43 PM
Tinman,

as i see it, your both pictures (first EX1) are confirming what MarkE is trying to tell you guys all along.

You guys are looking at the same famous picture of an old woman or a beautiful lady depending on how you look at it.

 
Open your mind, change your view, only then you will see

Regards Itsu
Itsu
What kind of magnetic field(flux) dose not induce a steel core when it passes by it?-none that i know of. This is a field that cant induce a feromagnetic core in an inductor to produce power,it is a field that dosnt attract any feromagnetic material. It is a Claytons field-the field you having when your not having one.
We see all these pictures(see below) of these wonderful field line's(which we know dont exist)
We see north and south writen all over them,and also what we learnt in school-but dont exist
And all these arrows that show us the direction of-->we dont know what.

All the test i have carried out can find no evidence of this field
The pic of the ferrofluid shows no evidence of this field-even the underside.
And the only evidence that has been shown that this field exist(other than hearsay)is iron filings sticking together due to them giving the flux a path to follow.
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poynt99

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Re: Magnet Myths and Misconceptions
« Reply #489 on: January 06, 2015, 02:22:19 PM »
Quote from: tinman on January 06, 2015, 12:44:00 PM
!st of many experiments carried out in the past year.
The picture tells the story,so no need for a long post.

What is A + C?
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tinman

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Re: Magnet Myths and Misconceptions
« Reply #490 on: January 06, 2015, 02:24:51 PM »
Quote from: poynt99 on January 06, 2015, 02:17:51 PM
Brad, remember my post explaining why you had the most induction when your pancake coil was in the middle? If not, perhaps review it.

The magnetic field of the magnet is not the strongest at the middle, in fact it is the same all along from end to end. But at the center, there is a maximum NET flux that can be intercepted by your coil, provided the coil encircles the magnet as you have shown.
Yes,i read the post Poynt.
Please see post 485 and486.
Why wont this area of maximum net flux make it's way through inductor B?,when either side A&C with less flux area will induce it's flux into the core of inductors A and C,and thus cause a current to flow-in opposite directions mind you.
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poynt99

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Re: Magnet Myths and Misconceptions
« Reply #491 on: January 06, 2015, 02:29:07 PM »
Quote from: tinman on January 06, 2015, 02:24:51 PM
Yes,i read the post Poynt.
Please see post 485 and486.
Why wont this area of maximum net flux make it's way through inductor B?,when either side A&C with less flux area will induce it's flux into the core of inductors A and C,and thus cause a current to flow-in opposite directions mind you.

Two reasons:

1) In the middle, most of the flux is confined within the magnet itself.

2) While swiping across the middle area, you are inducing as much positive voltage as you are negative, so what is the result?
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MarkE

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Re: Magnet Myths and Misconceptions
« Reply #492 on: January 06, 2015, 04:09:53 PM »
Quote from: tinman on January 06, 2015, 12:15:33 PM
Like i said before Mark,your compass experiment is flawed. Now how about you try your own experiment,and let us know the result's of my test.
You take two bar magnets,and you face the north of one end of one magnet to the south end of the other magnet. You now place a 1/2 inch plastic spacer inbetween those two magnet,so as you have(N-spacer-S). Now you know that there is a north and a south field there(im useing north and south-as that's what were taught in school,and we all know how much you like sticking to what we are taught)-->now try your own test. As you will know without even trying the test,the results will be exactly the same as the test you wish us to carry out.
Like i said,your compass test is flawed,and of no use to this thread.
Why do you think there is a flaw?  Unless you use a big compass, or get really sloppy you will be able to map the composite contour.
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MarkE

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Re: Magnet Myths and Misconceptions
« Reply #493 on: January 06, 2015, 04:13:27 PM »
Quote from: EMJunkie on January 06, 2015, 01:01:35 PM
Tinman - I concur! My Experiments agree! In-fact B will be repelled from its position there at the Bloch Wall!

Kind Regards

  Chris
LOL!  You think that in a stack of end to end high energy magnets that one of the adjacent N-S aligned magnets will repel?  You could easily lose a finger with such a loopy belief.
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MarkE

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Re: Magnet Myths and Misconceptions
« Reply #494 on: January 06, 2015, 04:14:41 PM »
Quote from: EMJunkie on January 06, 2015, 01:07:36 PM
Really - Simple questions give answers!


Why is there a Concave at the Bloch Wall and not Convex? This fact is exaggerated with Longer Magnets! I know MarkE's answer but for others - Why
You keep claiming that there is a Bloch wall where there is none and no evidence for one.   This put on act of yours is nuts.
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